giles



(No Model) r J. A. GILES.

- I TUBE EXPANDBR. No. 361,503. Patented Apr. 19, 1 887.

' Qrsm s .immYm I 6! I Q I I UNITED [STATES PATENT OFFICE.

JUL-IAN A. GILES, OF osWEeo, NEW YORK, ASSIGNOR TO ALBERT N. BADGLIFFE, or SAME PLACE.

TUBE-EXPANDER.

SPECIFICATION forming part of Letters Patent No. 361,503, dated April 19, 1887.

Application filed January 27, 1887. Serial No. 125,628. (No model.)

To all whom it may concern.-

Be it known that I, JULIAN A. GILES, of Oswego, in the county of Oswego, in the State of New York, have invented new and useful Improvements in Tube-Expanders, of which the following, taken in connection with the accompanying drawings, is a full, clear, and ex act description.

This invention relates to the class of tubeexpanders in which two or more rollers are supported rotatably and movable laterally in the expander head or body and adaptedto be introduced into the end of the tube to be expanded, and a tapering spindle or mandrel is inserted between the aforesaid rollers to press them outward against the inner sideof the tube, and, by revolving around the same, expand the end of the tube cireumferentially, so as to tighten its hold on the fluesheet.

The invention consists, chiefly, in i'mproved means for sustainingtheexpanding-rollers in the expander-body, as hereinafter fully described,and specifically set forth in the claims.

In the annexed drawings, Figure 1 is an outer face view of my improved tube expander. Fig. 2 is a transverse section of the expander-body, taken on line mm, Fig. 1. Fig. 3 is a detached plan view of the outer side of the bare expander-body. Fig. 4 is a detached detail view of one of the arms which sustain the expanding-rollers in the expander-body; and Fig. 5' is a detail view of the expandingroller.

Similar letters of reference indicate corresponding parts.

B represents the head or body of the tubeexpander, said body being of the form of a rigid annular metallic case provided with the axial opening a, for the reception of the usual tapering spindle or mandrel, A. The outer face or side of the body B is formed with an annular recess, 12, concentric with the opening a. In the recess 1), between the annular walls thereof and central opening, a, aforesaid, I pivot the arms 0 c o c, on the free end of which I journal the expandingrollers d d d d, which protrude through segmental slots 8 s s 8, extending from the opening (1 toward the periphery of the body B, concentrically with the pivots of the respective arms a c c c, said slots allowing the expanding-rollers d (l d to move toward and from the axial opening a of the body B. The aforesaid slots are of proper widths to afford bearings against the sides of the rollers, and thus assist in supporting said rollers when subjected to strain during the operation of expanding a tube. The rollers I provide with circumferential shoulders e, by which they bear on the face of the body B,and thus relieve pivots of the arms a c c c from any strain that may be exerted endwise on the rollers.

In order to connect the expanding-rollers more securely to the expander-body B, I divide each of the arms a longitudinally in a plane parallel with and extending through the axis of the eyes ff, which latter are parallel with each other. The roller at is journaled home of said eyes and is shouldered against opposite sides of the arm a, the two sections of which embrace the journal of the roller and are clamped together by a screw, Z, passing transversely through said sections of the arm. A stud-pin, it, passes through the other eye of the arm 0, and is firmly secured in the body B, to serve as a permanently-affixed pivot for the said arm.

In the operation of the described expander, the ends of the rollers d d d d, which protrude from the face of the body B, are introduced into the end of the tube to be expanded, then the tapering mandrel A is inserted in the axial opening a of the body and forced inward between the aforesaid rollers, and then, by turning the mandrel on its axis, the rollers d d cl receive rotary motion by the frictional hold on the rotating mandrel. The travel of the said outwardly-crowded rollers around theinterior of the tube causes thetube to be expanded and tightened in the hole provided for it in the flue-sheet.

Having described my invention,whatI claim as new, and desire to secure by Letters Patent, 1s-

1. In a tube-expander,-the combination of an annular body, arms pivoted to said body.

2. In a tube-expander, the combination of the expander-body having an axial opening, arms pivoted to said body and adapted to swing toward and from the axial opening thereof, expanding-rollers journaled on the free ends of said arms, slots in the bodyin the paths of the rollers, and the mandrel inserted in the axial opening of the body, as specified.

3. I11 a tube-expander, the combination of the expanding-mandrel, the expander-body having an axial opening, arms pivoted to said body and adapted to swing toward and from the axial opening thereof, segmental slots in the body, each concentric with one of the pivots of the arms,and expanding-rollersjournaled on the free ends of the arms and extending through the aforesaid slots and bearing against opposite sides thereof to be supported thereby, substantially as set forth.

4. The combination of the expander-body having an axial opening, arms pivoted to said body and adapted to swing toward and from the axial opening, segmental slots in the body, each concentric with one of the pivots of the arms, and expanding-rollers journaled on the free ends of said arms and extending through the slots and provided with circumferential shoulders bearing on the face of the body, substantially as described and shown.

5. The expander-body provided with the axial opening, an annular recess in one side concentric with the aforesaid opening, and

slots extending from the axial opening toward the periphery of the body, in combination with arms pivoted in the recess of the body and adapted to swing toward and from the axial opening thereof, expanding-rollers journaled on the free ends of said arms and extending through the aforesaid slots, and the mandrel inserted in the axial opening of the body, all combined substantially as described and shown.

6. In combination with the expander-body and expanding-mandrel, the arms a a, each provided with parallel journaling-eyes at opposite ends and divided longitudinally in a plane parallel with and extending through the axis of said eyes and the sections of the arm detachably united, stud-pins passing through one of the eyes of each arm and pivoting the same on the expander body, and the expanding-rollers journaled in the eyes in the free ends of the arms, substantially as described and shown.

In testimony whereof I have hereunto signed my name and affixed my seal, in the presence of two attesting witnesses, at Oswego city. in the county of Osweg'o, in the State of New York, this 22d day of January, 1887.

JULIAN A. GILES. [n s.]

Witnesses:

O. J. HOLLAND, O. 0. PLACE. 

